You'll noticeTier: how much it should matter to you
3Useful: my rating, 1 to 5
0Signal: worth watching, 1 to 5
Model FallbackArea: what it touches
ImprovementsKind: in v2.1.220,
ImprovementsSection of the release
What
A new predicate detects sessions where Claude Code has no entitlement data at all, and the Opus lineup walk used for refusal fallback filters Opus 5 out in that state.
Details
isEntitlementOverlayUnavailable returns true when the provider is first-party, an OAuth token is stored, the profile scope is absent, no Anthropic API key is set, and the cached model-access list is empty.
A helper combines that predicate with a canonical-name check against "claude-opus-5"; the candidate scan becomes .find((n) => N1e(lo(n)) && !u2c(n) && r(n)), and a sibling helper substitutes "claude-opus-4-8" in its place.
No remote flag is involved. It is driven purely by runtime auth and cache state, so a first-party OAuth session with an empty entitlement cache will not auto-pick Opus 5 as a fallback target.
Evidence
isEntitlementOverlayUnavailable
Strings lifted out of the shipped bundle, so the claim above can be checked against them.
